104 LIMN XWJE. 



Order PULMONATA. 



Suborder HYGROPHILA. 

 Family LIMN^EID.E. 

 Subfamily ANCYLIN^. 



Shell patelliform, without spire. 



Distribution. Temperate and Tropical Regions of the World. 



Genus ANCYLUS. 



Ancylus, Geoffroy, Traite" de Coq. de Paris, 1767; Clessin, Conch.- 

 Cab., 1882, p. 11, etc. 



TYPE, A. Jluviatilis, Linnaeus, from Europe generally, Algeria 

 and Madeira. 



Range. Europe, Asia. 



Shell small, patelliform, either dextral or simstral, thin, conoidal ; 

 aperture either ovate or rounded ; peristome acute, simple. 



Animal having the lateral teeth of the tongue narrow, sharp 

 pointed, and the cardinal [median] tooth, small, rounded. 



206. Ancylus "baconi, Bouryuignat. 



Ancylus baconi, Bourguignat, Cat. Ancyl. in Journ. de Conch, iv, 

 1853, p. 181; Bourg. Descr. Ancyl. Cuming in P. Z. S. 1853, 

 p. 89, pi. 25, figs. 18-25; H. & A. Adams, Gen. Rec. Moll. 

 ii, 1855, p. 266; Bourg. Spicil. Malac. 1862, p. 205; Clessin in 

 Conch.-Cab. 1882, p. 61, pi. 7, fig. 7. 



Original description : Testa autice recta vel paululum convexa, 

 postice recta vel paululum concava ; apice postico, obtusissirno, 

 paululum dextrorsus dejecto ; depressione apicali vix conspicua, 

 in extremitate verticis sita. Testa parva, fragili, diaphana, 

 laevissima, vel concentrice striatula ; epidermide albido-virescente ; 

 apertura ovata. 



Alt. 1, diam. maj.-3, diam. min. 2 mm. 



Hal). Bengal. 



207. Ancylus ceylanicus, Benson. 



Ancylus ceylanicus, Benson, A. M. N. H. ser. 3, xiii, 1864, p. 139 ; 

 H. & T., C. I. pi. 81, figs. 2, 3. 



Original description : Testa suboblonge conoidea, antice con- 

 vexa, postice concava, extus tenuissime radiato-costulata, costis 

 subremotis elevatioribus munita, striis confertis concentricis de- 

 cussata, viridescenti-cornea, margine lato, lulescenti-cornea, apiee 



